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arXiv 2001.10777astro-ph.HE
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寻找$γ$射线活动星系核的准周期调制

Searching for Quasi-Periodic Modulations in $γ$-ray Active Galactic Nuclei

Pengfei Zhang, Dahai Yan, Jianeng Zhou, Jiancheng Wang, Li Zhang

摘要:

本文对第三个\emph{Fermi}大天区望远镜源表(3FGL)中$γ$射线活动星系核(AGN)的准周期变化进行了系统的研究。我们采用两种技术,Lomb-Scargle周期图(LSP)和加权小波Z变换(WWZ),以获得功率谱的$γ$射线光变曲线覆盖从2008年8月到2016年12月。结果表明,除了几个对象,已在以前的工作中,一个额外的源,FSRQ PKS 0601-70有一个可能的准周期变化的450天的$γ$射线光变曲线的意义$>3σ$。我们的研究结果的物理意义进行了讨论。

英文摘要:

We perform a systematic search of quasi-periodic variabilities in $γ$-ray active galactic nuclei (AGNs) in the third \emph{Fermi} Large Area Telescope source catalog (3FGL). We employe two techniques, Lomb-Scargle Periodogram (LSP) and Weighted Wavelet Z-transform (WWZ), to obtain power spectra of $γ$-ray light curves covering from 2008 August to 2016 December. The results show that besides several objects that have been reported in previous works, an additional source, the FSRQ PKS 0601-70 has a possible quasi-periodic variability of 450 days in its $γ$-ray light curves with the significance of $>3σ$. The physical implications of our findings are discussed.

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